Demco Hydraulic Brake Actuator w/ Manual Lockout - Primed - 8" Adjustable Channel - 8,000 lbs

Video Transcript for Review of Demco Brake Actuator - Surge Brake Actuator - DM8759933

Jeff: Hello everybody. This is Jeff at etrailer.com. Today we're going to take a look at this Demco eight inch adjustable Channel-down Hydraulic Drum Brake actuator, with the manual lockout and an 8,000 pound capacity. Now this hydraulic actuator will activate your trailer's brakes when your tow vehicle slows or stops. Basically what happens is when you apply the brakes in your tow vehicle, deceleration will occur and the momentum will push your trailer toward the rear of your vehicle. So with a surge brake system, this actuator is triggered as your trailer moves forward, once the tow vehicle starts to slow down.

And when this happens, the inner slide portion right here of the actuator will actually contract inside the outer portion and it applies force to this master cylinder in the back right here. And then that'll in turn supply the necessary hydraulic pressure to engage your trailer's brakes.Now this one. I want to zoom in a little bit. This one will have a nice acetal copolymer lining around the whole inner slide here, provides a nice, smooth operation as the inner slide will telescope in and out. We mentioned its adjustable channel design.

You can see it has the three different mounting positions for your coupler. Now the coupler is not included, that we do sell separately on our website. And as we mentioned, this one's a channel-down design, you can see the channel is mostly down and that'll allow for a greater drop. Now it does include this reverse lockout right over here. And what that do it's a manual reverse lockout, so you actually manually have to set it.

But what it will do is the electric reverse, go in reverse without actuating your trailer's brakes, because when you go in reverse, you don't want the brakes to be applied.So all you have to do with the manual lockout is just lift up on this tab, move it over and put it on the little ledge there. And you can see that tab when it goes. the center slide goes to go back. that tab here will keep it from going back and that'll allow the brakes not to be applied and allow you to go in reverse. And then when you're done, when you're ready to go forward, just remove the tab and let it drop down and it'll hang right on the bolt here.

This is a heavy duty steel construction. You can see it has a nice prime finish to it. We mentioned the master cylinder right in the back here. It is a nice composite master cylinder. It's very durable and efficient. It is a glass-reinforced nylon construction, which will resist rust and corrosion.And it is a very large reservoir, so provides increased capacity for your brake fluid. If you notice at the top, it has a nice automotive style diaphragm cap, that'll create a completely enclosed system, to help prevent contamination of your brake fluid. It does come with the breakaway cable and the latch hook right here you can see it is included. This breakaway cable is required by law. And what this breakaway cable does, is you'll take this hook and latch it to your tow vehicle. And what it prevents is a trailer runaway situation. So if by chance your trailer ever gets disconnected, you make sure this is hooked up. What it'll do is pull on this cable, which will move that latch, which will again, apply pressure in the master cylinder, and it will put brakes on the trailer to prevent a runaway situation. So it is included.This is a weld-on installation and it is made in the USA. Application again is for trailers with hydraulic drum brakes. Gross towing weight capacity is 8,000 pounds. Maximum tongue weight is 800 pounds. The channel width is the inside with. So if we take a ruler and we go inside, the inside is right at three inches. Channel height we mentioned is eight inches. And this is designed to mount to a three-inch-wide trailer tongue. Model number on this goes by DA91. But that should do it for the review on this Demco eight inch adjustable Channel-Down Hydraulic Drum Brake actuator, with the manual lockout and an 8,000 pound weight capacity.